Dumping vehicle



June 24, 1930. c. F. HIGGINS DUMPING`VEHICLE Filed April 3, 1925 2 SheeS-Sheet. 1

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DUMPING VEHICLE Filed April 5, 1925 2 sheets-sheet 2 June 24, 1930.

Patented June 24, 1930 UNETED sra CLARK E. HIGGINS, E MELROSE, MASSACHUSETTS l DUMPING Application led April 3,

The present invention relates to dumping vehicles and more particularly-to elevating or hoisting mechanisms for Vdumping vehicles.

VA:s The object of the'. present invention is to reorganize and improve the construction of dumping vehicles with a view of obtaining eficient hoisting operation under all conditions, especially when the body of the vehicle is to be `raised to a high `hoist position.

With this object in View Vthe present invention consists in the dumping vehicle hereinafter described and particularly defined in the claims. Y Q n In the accompanying drawings Fig.. 1 is a central sectional longitudinal elevation of the body and hoisting mechanism of the improved dumping vehicle; Fig. 2 isa View similar to F ig. 1 showing the parts in dif- 20 ferent positions; andFig. 3' iswa plan View of one side of the ing structure. Y y

.The illustrated embodimentfof the invention comprises a bed or foundation tfadapted-to be mounted on the chassisof the vehicle and provided at its rear end 'with ears 6 receiving `afshaft 8 on which is pivoted a pair. of body supporting members or Vside Aarms 10` at opposite sides of the vehicle,

body supporting Vand hoistonly oneof whichzis shown in the drawings.

The body-supporting members 10 carry the body 12 ina mannerl presently to be de`- scribed in detail. Connected with each kof the body supporting members 10 is a curved hoist armlt,` which is pivoted at one end upon 5a shaft 16 extending acrossthevehicle between the supporting memberslO. The twolhoist arms at opposite sides of the vehin cle are connected together fand braced by diagonal cross pieces 18. Attached to the free end of each hoist arm 14 is a'lat Vlink chain20, which engages with and conforms to the convex under surface .of the hoist arm for the maj or portion of its length, the chain being connected @at its other end to a winding shaft 22 adapted to be rotated lby suitable gearing .contained ina transmission lcasing 24 and connected with :the transmission ofl the vehicle in any usual or'A preferred manz ner. Upon.` rotation `of the shaftV thechain',

ing' members to the position VEHICLE 1925.Y serial No. 20,380.

being flat, is adapted to wind spirally on itself, Vas shown in Fig. 1,' the connection of the chain to the'shaft being made through a lug 26 on the shaft, which has a spiral surface of such formas to support the chain during the winding operation. It will be seen that the chain by its engagement with the under surface of the hoist arm serves not only to'eX'ert 'a tension at the outer end of the hoistvarm, but also by its supporting action'to eXertan upward thrust to the arm, which assists' in the initial elevation of the body, andmoreover by virtue of the spiral winding ofthe fiat chains upon theshaft a uniformwinding ofeach chain anda consequent uniform tension von each of the hoist arms are assured.

Proceeding now tothe mounting of the body upon the vehicle, it will be seen that each body supporting member 10 comprises a channel iron 28 mounted to which is attachedan'ear 8O for`V pivotal vconnection on the shaft 8.` Secured at 'the forward end of thechannel 28 is a second channel -iron 31 whichV is rivetedy to the channel 28 'and faces in the opposite direction therefrom.` The body 12 comprises a boxsha'ped structure of the" usual form mounted on channel irons 32 at opposite sidesv of the Vehicle. The body and body supporting members are Vconnected at each side of the vehicle by a bar Stfpivoted at one end upon the shaft :16 Vandv at the other end upon a shaft 38 which extends between the channels 320i the body across the vehicle and which rests in a recess 40 in each ofthe body supporting members whenthe bodyk is in Vhorizontal or rear dump position. At the 'front' end7 each body supportingmember is connected-*with the'body through apin 42 lattached to the channel iron 31 yand received in an inclined slideway 14 comprising a vchannel'secured at oneend to the body and supported at the other endc byv a'bracket 46 also attached to the body.

farm isact'uated to -elevate the body supportp 110 shown'in full lines in Fig. 1,` the 'body at this time beinginormally carried along with it'as a on an I-bea'm29, f

Upon rotation ofthe shaft 22 the hoist n unit to the rear dump position indicated at 112 in Fig. 2. Provision is made for causing relative movement between the body and the body supporting members to elevate the rear end of the former during the hoisting operation if desired. For this purpose each hoist arm 14 is provided with a projection 50 adapted to be engaged by a thrust member 52 pivoted upon a block 54' which is secured to the bar 34. The thrust member 52 has a notch 56 in its forward end and a rear notch 58 in a projection formed intermediate to its ends. The operation of the thrust member will be apparent from Figs. 1 and 2. lVhen the thrust member is maintained entirely out of engagement with the projection 5() of the hoist arm, the body and body supporting membersare moved together las a unit about thepivot 8 into rear dump position 112. lVhen the thrust member. is set so that the projection engages in the intermediate notch 58, the rearend of the body is moved relatively to tliebody supporting members, the body yturning on its front end pivotal connection formed by the 'pin i2 in the slideway 4141, while thebody support-ing members are moved to thesame position` as before by the hoist arm. If thethrust member is arranged so that when the projection 50 enga-ges in the forward notch 56, the body is raised to a still higher position; namely, the high hoist position indicated in dot-and-v dash lines in Fig. 2. It will be seen that in the intermediate and high hoist positions there occurs a relative longitudinal movement -be-4 tween the body supporting members and the body by virtue of the rigid connection of the bar 84. This causes a sliding of the pin 4 2 in theslideway 4e, which through the inclination of the slideway necessarily elevates the fro-nt end of the body, thusgiving a considerable increase in the inclination of the body for vdumping in these positions. Provision is made for setting `thev thrust member prior to the hoisting operation, in order that it may be held entirely. out of engagement with the projection 50 orcaused to have Cil selective engagement therewith in either the notch 5G or the notch 58. For this purpose each thrust member is normally held up out of the path of movement of the projection 5() of Ithe hoist arm by means of a latch 60 adapted to engage with the notched'forward end of its corresponding thrust member, the :two latches being secured to a rock shaft 62 -journaledin the body supporting members 10. at opposite, sides of the vehicle., A ,weighted arm 64 secured to .the rocklshaft B2 at one end normally retains the latch Vin position to engage thefthrust member, `vand a hook `66 is'provided by which the latch may be held in a position out of engagement with the thrust member when the arm 64 is manually lifted. In this` latter case the thrust member tends to drop into a position to be in Fig. 1, against a suitable stop (not shown) for lifting the thrust member in position to receive the projection 50 in the rear notch 58 to raise the body to intermediate position. Connected between each latch 68 and the foundation 4 is a` tension spring acting off center from the axis of the rock; shaft 70 to` hold the latch in either ofthe :positions to which it may be moved. By this construction both latches may be moved 'fromone ypositionrto the other by manually turning either one of them. g y i It will be seen .that by the provision of the thrust member for se ective engagement with the hoisting arms `a convenient means is provided for determining the elevation to which the body may be raised. The hoisting mechanism consisting of the hoist arms and their cooperating chains is simple and rug ged in construction. The particular type of chain employed constitutes a flexible winding member which supports its ,correspond ing hoist arm both when the body is in carrying position and When it is being ele. vated, the provision for uniform winding of the chains on the shaft insuring uniform lifting stresses on both sides of the vehicle. Having thus described the invention, what is claimed is:

' l1. A dumping vehicle having, incombination, body supporting members pivoted at the rear end of the vehicle, a body connected atv its front end with the body :supporting members, hoist arms for elevating the body supporting members about their pivots, thrust members connected with the body and having provision .for .ser lective engagementv at different positions with the hoist arms to elevate the lrear end of the body to different heights relatively to the body ksupporting members, and means for holding the thrust members `in position -out of engagement with the hoist .arms to permit the body to be raised to rear dump position.

2. A `dumping vehicle having, in combination, body supporting Vmembers .pivoted on the rear end of the vehicle, a body connected with thevbody supporting members, hoist arms for elevating the body supporting members, thrust members conneotedfwith the 'body each having .a plurality of .notches for `engagement with the hoist arms to yelevate the rear. end .of the body relatively to Ythe body supporting members, a `latch for nor- CLARK F. HIGGINS. 

